The Collaborative International Dictionary of English v.0.48:

Fulminuric \Ful"mi*nu"ric\, a. [Fulminic + cyanuric.] (Chem.)
   Pertaining to fulminic and cyanuric acids, and designating an
   acid so called.
   [1913 Webster]

   Fulminuric acid (Chem.), a white, crystalline, explosive
      substance, H3C3N3O3, forming well known salts, and
      obtained from the fulminates. It is isomeric with cyanuric
      acid, and hence is also called isocyanuric acid.
      [1913 Webster]